22011863 has 2 divisors, whose sum is σ = 22011864. Its totient is φ = 22011862.

The previous prime is 22011853. The next prime is 22011877. The reversal of 22011863 is 36811022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22011863 - 2⁸ = 22011607 is a prime.

It is a super-2 number, since 2×22011863² = 969044225461538, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005931 + 11005932.

It is an arithmetic number, because the mean of its divisors is an integer number (11005932).

Almost surely, 2^22011863 is an apocalyptic number.

22011863 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011863 is an equidigital number, since it uses as much as digits as its factorization.

22011863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 22011863 is about 4691.6801894417. The cubic root of 22011863 is about 280.2542885498.

Adding to 22011863 its reverse (36811022), we get a palindrome (58822885).

The spelling of 22011863 in words is "twenty-two million, eleven thousand, eight hundred sixty-three".